Electric Power

Power \((P)\) is the rate of doing work and is measured by the amount of foot pounds of work done in a particular unit of time. A horsepower is a measure of power.

 

Power (Watt) formulas

\(\large{ Watts = \frac{Volts^2}{Ohms} = P = \frac{V^2}{R} }\)
\(\large{ Watts = Volts^2 \; Ohms = P = V^2 \; R }\)
\(\large{ Watts = Volts \; Amps = P = V \; I }\)

Where:

Units	English	Metric
\(\large{ P }\) = power	\(\large{W}\)	\(\large{\frac{kg-m^2}{s^3}}\)
\(\large{ I }\) = current	\(\large{I}\)	\(\large{\frac{C}{s}}\)
\(\large{ R }\) = resistance	\(\large{\Omega}\)	\(\large{\frac{kg-m^2}{s^3-A^2}}\)
\(\large{ V }\) = volt	\(\large{V}\)	\(\large{\frac{kg-m^2}{s^{3}-A}}\)